彩正照相性能测定方法标准要点及编制依据

一、引言 彩色电影正片是制作彩色电影发行拷贝使用的原材料。其感光度和平均斜率是两项十分重要的性能参数。 在传统的感光测定方法中,通常以特性曲线直线部的斜率(即反差系数)表示胶片的反差特性,而未考虑到趾部和包括肩部在内的上部各段的平均斜率情况。然而,由于彩色正片是供放映和直接观察影像用的胶片,其特性曲线直线部以外的弯曲线段(特别是趾部)实际上亦在应用范畴之内,这些部份对影调和色彩的表达具有直接的影响。众所周知,影调。

论《正四方珐琅彩之五行壶》的艺术特色

紫砂壶创作充分借鉴、吸收中国优秀传统文化与艺术形式,实现了自身的成长,发挥了传承中国文化与工艺精神的关键作用。《正四方珐琅彩之五行壶》采用了经典的四方造型,并将珐琅彩与绘金装饰融入其中,打造出的纹样华美、闪耀,艺术风格独特。作品的创新之处在于大胆地融合了其他艺术形式,并将中国独特的五行学说予以艺术化的呈现,闪烁着匠心的精神与哲学的智慧。

球场观众助威行为的理论研究

采用文献资料法和逻辑分析法对球场观众助威行为进行探讨。研究发现球场观众助威行为具有倾向性、项目差异性和互动性等特点。分别从球场观众助威行为方式、球场观众助威行为意图和球场观众助威行为文明程度来进行一维分类。然后,结合球场观众助威行为方式、意图和文明程度,又对球场观众助威行为进行了三维分类。最后,从球场观众助威行为与赛场情境之间的关系,阐述了球场观众与球场人员之间的互动以及球场观众之间的互动过程,并初步建构了球场观众助威行为的互动理论模型。

Relighting multiple color textures

With the development of digital library technology, library books made of paper can be digital released and read, and Endangered Cultural Heritages can be preserved. Traditional library＇s contents and functions can be greatly enhanced by digital technologies. For these new library objects, the primary key problem is precisely reconstructing their 3D models. When constructing complete 3D models, multiple color texture maps are often necessary. A commonly encountered problem uncounted during fusing of textures from multiple color images is color distortion. Each texture of a single 3D model may be obtained under possibly different lighting conditions and color response of the camera. To remove any visible seam and improve color consistency between the textures while avoiding color distortion, we propose a new efficient algorithm to relight all the texture images globally, spread residual light difference, and recolor each image by homogeneous transformation. A relative illumination model was adopted to obtain the relighting function. We choose lαβ color space with minimal correlation between channels for many natural scenes, for calculating the relighting result. Looking into two overlapped images A and B, we can pairwise relight B into A＇s luminosity condition in two steps. We first scale B＇s l channel by the lA/lB ratio of the overlapped region. We can assume A and B are in a same color plane now. Then a homogeneous transformation is applied to B＇s a and fl channels which moves B into A＇s hue and saturation condition. For multiple overlapped color textures, a patch based weighted global relighting method was proposed to minimize the total color difference. The pairwise relighting method was used between each two overlapped images, and the difference in every overlapped region after relighting was weighted and summed up to construct an energy value. We used Nelder-Mead method to find a minimal energy value and the relighting parameters for every image. After global relighting, textures become almost coherent. We simply blended the overlapped region along the texture border to remove small visual seams and get a final result. We illustrate our method by calibrating textures of a painted sculpture acquired with laser scanner. Experimental results were realistic and reliable and showed how this method can fuse multiple textures without color distortion.

Atmospheric correction of ocean color imagery over turbid coastal waters using active and passive remote sensing

This paper demonstrates an atmospheric correction method to process MODIS/Aqua (Moderate-resolution Imaging Spectroradiometer) ocean color imagery over turbid coastal waters with the aid of concurrent CALIOP (Cloud-Aerosol LIdar with Orthogonal Polarization) aerosol data, assuming that there exists "nonturbid" water in the study area where MODIS aerosol optical properties can be retrieved accurately. Aerosol properties from CALIOP measurements were obtained and related to those from MODIS. This relationship, combined with CALIOP aerosol data, was extended to turbid water to derive MODIS aerosol properties, where atmospheric correction using MODIS data alone often fails. By combining MODIS and CALIOP data, aerosol signals were separated from the total signals at the satellite level, and water-leaving radiances in turbid waters were subsequently derived. This method was tested on several MODIS/Aqua ocean color images over South China turbid waters. Comparison with field data shows that this method was effective in reducing the errors in the retrieved water-leaving radiance values to some extent. In the Zhujiang (Pearl) River Estuary, this method did not overestimate the aerosol effects as severely, and provided far fewer negative water-leaving radiance values than the NASA (National Aeronautics and Space Administration) default methods that used MODIS data alone.

Advanced tufted carpet patterning technology

After a review of the tufting industry’s development, and a brief introduction to available systems for producing patterned tufted carpets, the principle of ICN (Individually Controlled Needle) and the related advanced tufting technology Col-ortec are presented. Finally, Colortec machine, Axminster weaving machine, and Wilton loom are compared. It is believed that the Cobble Colortec machine is a significant jump forward in the tufted carpets industry as it now allows access to all major carpet markets in a competitive fashion.

清雍正粉彩花卉纹盘吉祥纹饰赏析

吉祥纹饰是中国传统文化中独具特色的一部分,寄托了古代人民对美好生活的向往。本文通过赏析济南市博物馆馆藏的清雍正粉彩花卉纹盘上所绘的吉祥纹饰,并按照题材对其进行分类,深入探索吉祥纹饰的独特魅力及其背后的文化交流。

为香港回归而作(七律二首)

庆回归 吉星九七照乾元, 世界凝眸同一天。 南海喜传歌阵阵, 香江激荡舞翩翩。 金瓯盼到团圆日, 青史掀开灿烂篇。 夜景太平山上望, 流红溢彩正空前。

An efficient quadrature demodulator for medical ultrasound imaging

Quadrature demodulation is used in medical ultrasound imaging to derive the envelope and instantaneous phase of the received radio-frequency(RF) signal.In quadrature demodulation,RF signal is multiplied with the sine and cosine wave reference signal and then low-pass filtered to produce the base-band complex signal,which has high computational complexity.In this paper,we propose an efficient quadrature demodulation method for B-mode and color flow imaging,in which the RF signal is demodulated by a pair of finite impulse response filters without mixing with the reference signal,to reduce the computational complexity.The proposed method was evaluated with simulation and in vivo experiments.From the simulation results,the proposed quadrature demodulation method produced similar normalized residual sum of squares(NRSS) and velocity profile compared with the conventional quadrature demodulation method.In the in vivo color flow imaging experiments,the time of the demodulation process was 5.66 ms and 3.36 ms,for the conventional method and the proposed method,respectively.These results indicated that the proposed method can maintain the performance of quadrature demodulation while reducing computational complexity.

A correction method of color projection fringes in 3D contour measurement

In the three-dimensional(3D) contour measurement,the phase shift profilometry(PSP) method is the most widely used one.However,the measurement speed of PSP is very low because of the multiple projections.In order to improve the measurement speed,color grating stripes are used for measurement in this paper.During the measurement,only one color sinusoidal fringe is projected on the measured object.Therefore,the measurement speed is greatly improved.Since there is coupling or interference phenomenon between the adjacent color grating stripes,a color correction method is used to improve the measurement results.A method for correcting nonlinear error of measurement system is proposed in this paper,and the sinusoidal property of acquired image after correction is better than that before correction.Experimental results show that with these correction methods,the measurement errors can be reduced.Therefore,it can support a good foundation for the high-precision 3D reconstruction.